I’m building a mobile app whose sole focus is accurate astrological calculation and prediction. Users will enter their birth data and instantly receive personalised horoscope forecasts generated by an in-app calculation engine. The app must handle ephemeris look-ups, house and aspect calculations, then transform those results into clear predictive text that can be displayed in a clean, modern UI. The core I need from you is the algorithmic backbone—think Swiss Ephemeris-level precision—wrapped in a stable cross-platform shell (Flutter or React Native are both fine; if you have a better suggestion, let’s discuss). While the initial launch centres on horoscope predictions, the architecture should be flexible enough to accommodate future add-ons such as zodiac compatibility or transit alerts without a full rewrite. Deliverables • Cross-platform mobile app (Android and iOS) compiled and ready for store submission • Modular calculation engine producing personalised horoscope text • Simple dashboard UI for input, result display, and basic settings • Well-commented source code and brief setup documentation Acceptance criteria 1. Entering date, time, and place of birth returns a complete horoscope prediction in under three seconds on a mid-range device. 2. Planetary positions match standard ephemeris data to within one arc-minute. 3. Code passes a quick review for readability and modularity. If you have experience with astronomical mathematics, astrology software, or have previously integrated the Swiss Ephemeris (or similar libraries) into mobile apps, that will give you a head start. Let me know how you would approach the calculation layer and any libraries or frameworks you prefer.